摘要
本文在测定黑龙江省几种主要土壤全锌和有效锌含量的基础上,进一步采用化学连续浸提法测定了土壤中7种形态锌;交换态锌(Ex-Zn)、碳酸盐结合态锌(CARB—Zn)(石灰性土壤)、有机质结合态锌(OM-Zn)、锰氧化物结合态锌(MnO-Zn)、无定形铁氧化物结合态锌(AFeO-Zn)、晶型铁氧化物结合态锌(CFeO-Zn)和残留态锌(RES-Zn)的含量。并通过各形态锌含量间相关分析和生物试验,验证土壤7种形态锌中以 OM-Zn,MnO-Zn 和 AFeO-Zn 有效性较高,而以 CFeO-Zn 和 RES-Zn 有效性低,Ex-Zn 和 MnO-Zn 分别与 OM—Zn 和AFeO-Zn 间存在着密切的动态依存关系。土壤中锰氧化物及无定形铁氧化物对土壤锌的有效化及土壤供锌能力具有重要作用。
On the basis of measuring the content of total Zn and auailable Zn,a sequential Znfractionation method is used to investigate contents of seven forms of Zn,includingexchangeable(Ex-Zn),carbonates-bound(CARB-Zn)organically-bound(OM-Zn)Mn-oxide-bound(MnO-Zn)amorphous Fe-oxide-bound(AFeO-Zn),CrytstallineFe-oxide-bound(CFeO-Zn)and residual(RES-Zn).In addition,by correlation analysis ofdiffercnt Zn content and verification of plant experiment,the results show that:of sevenfforms of Zn,OM-Zn,MnO-Zn and AFeO-Zn are active and more active,butCFeO-Zn and RES-Zn are inactive Ex-Zn and OM-Zn have a significant correlation,ei-ther with MnO-Zn or with AFeO-Zn.In soil,Mn-oxides and amorphous Fe-oxides havean important effect on Zinc availability and soil Zn supply force.
关键词
土壤
锌
有效性
organically-bound Zn(OM-Zn)
Mn-oxide-bound Zn(MnO-Zn)
amorphous Fe-oxide-bound Zn(AFeO-Zn)
plant Zn content
